Batter hits grounder into the Outfield. R3 scores easliy. R2 rounds 3rd and heads for home. R3, after having scored, commits Interference while the Defense is trying to make a play on R2 coming Home. R3 is called for INT and R2 is called Out at Home.

R1 had made it to 3rd and the batter/Runner to 2nd. Do they stay? Or, are they sent back to 2nd and 1st?